examples/libsmbclient/testtruncate.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <string.h>
   4 #include <time.h>
   5 #include <errno.h>
   6 #include <libsmbclient.h>
   7 #include "get_auth_data_fn.h"
   8
   9
  10 int main(int argc, char * argv[])
  11 {
  12     int             fd;
  13     int             ret;
  14     int             debug = 0;
  15     int             savedErrno;
  16     char            buffer[128];
  17     struct stat     st;
  18
  19     if (argc != 2)
  20     {
  21         printf("usage: "
  22                "%s smb://path/to/file\n",
  23                argv[0]);
  24         return 1;
  25     }
  26
  27     smbc_init(get_auth_data_fn, debug);
  28
  29     if ((fd = smbc_open(argv[1], O_WRONLY | O_CREAT | O_TRUNC, 0)) < 0)
  30     {
  31         perror("smbc_open");
  32         return 1;
  33     }
  34
  35     strcpy(buffer, "Hello world.\nThis is a test.\n");
  36
  37     ret = smbc_write(fd, buffer, strlen(buffer));
  38     savedErrno = errno;
  39     smbc_close(fd);
  40
  41     if (ret < 0)
  42     {
  43         errno = savedErrno;
  44         perror("write");
  45     }
  46
  47     if (smbc_stat(argv[1], &st) < 0)
  48     {
  49         perror("smbc_stat");
  50         return 1;
  51     }
  52
  53     printf("Original size: %lu\n", (unsigned long) st.st_size);
  54
  55     if ((fd = smbc_open(argv[1], O_WRONLY, 0)) < 0)
  56     {
  57         perror("smbc_open");
  58         return 1;
  59     }
  60
  61     ret = smbc_ftruncate(fd, 13);
  62     savedErrno = errno;
  63     smbc_close(fd);
  64     if (ret < 0)
  65     {
  66         errno = savedErrno;
  67         perror("smbc_ftruncate");
  68         return 1;
  69     }
  70
  71     if (smbc_stat(argv[1], &st) < 0)
  72     {
  73         perror("smbc_stat");
  74         return 1;
  75     }
  76
  77     printf("New size: %lu\n", (unsigned long) st.st_size);
  78
  79     return 0;
  80 }